V2X Resource Scheduling via Dynamic BWP Indicator
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Solution Overview
Problem
Current V2X communication systems, such as LTE-V2X, face limitations in processing capability and resource allocation, which hinder support for advanced use cases with stringent latency requirements, and the introduction of 5G-NR V2X (NR-V2X) necessitates more flexible and faster resource scheduling.
Innovation Solution
The method involves allocating bandwidth parts (BWPs) for both LTE-V2X and NR-V2X operations using a BWP indicator in the DCI format, allowing dynamic switching between LTE and NR transmissions, and incorporating a transmission start timing indicator to accommodate varying processing capabilities, enabling faster and more flexible scheduling of sidelink resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE-V2X uses a fixed 4ms processing time assumption, then UE processing capability is simplified, but advanced use cases with stringent latency requirements (3ms, 10ms) cannot be supported
Solution Approach 1:
The patent introduces dynamic processing time indication through the DCI format, where the base station can signal different processing time requirements (e.g., 3ms, 10ms) based on actual V2X use case needs. This dynamic adjustment allows the system to adapt to varying latency requirements without requiring UEs to continuously monitor and adjust their processing capabilities, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent changes the processing time parameter from a fixed 4ms assumption to a variable parameter that can be indicated through DCI formats. By allowing the processing time to be dynamically adjusted based on the specific V2X service requirements, the system can support advanced use cases with stringent latency requirements while maintaining UE simplicity through network-side configuration.
2Productivity
If a single DCI format is used for both LTE-V2X and NR-V2X, then device complexity is reduced, but resource allocation flexibility and speed are limited
Solution Approach 1:
The patent creates a universal DCI format that can serve both LTE-V2X and NR-V2X operations by incorporating a BWP indicator field. This single DCI format structure can dynamically indicate whether the scheduling is for LTE or NR, allowing one format to perform multiple functions. This resolves the contradiction by maintaining structural simplicity while achieving the flexibility needed for both technologies.
Solution Approach 2:
The patent segments the resource allocation functionality by introducing a BWP indicator field within the DCI format. This segmentation allows the DCI to distinguish between different technology modes (LTE-V2X vs. NR-V2X) and allocate resources accordingly, providing the flexibility and speed needed for advanced V2X use cases while maintaining a unified control structure.
3Adaptability or versatility
If bandwidth is divided into multiple independent frequency channels, then channel interference is reduced, but resource allocation flexibility and switching speed are limited
Solution Approach 1:
The patent introduces dynamic BWP switching capability where the network can dynamically allocate different bandwidth parts to UEs based on real-time needs. The DCI format includes a BWP indicator that enables fast switching between different bandwidth configurations without requiring complex manual channel reconfiguration. This dynamic approach provides resource allocation flexibility while simplifying the channel configuration through automated network-side management.
Data Source
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AI summary
A method and an apparatus for performing resource scheduling and delivering control information in a vehicle-to-everything (V2X) communication system are provided. The method for performing, a base station (BS), the resource scheduling and delivering control information in the V2X communication system includes transmitting, to at least one user equipment (UE), a downlink control information (DCI) format associated with a cellular vehicle-to-everything (C-V2X) carrier, wherein the C-V2X carrier includes a plurality of bandwidth parts (BWPs), incorporating a BWP indicator in the DCI format, allocating at least one of the BWPs for a long term evolution V2X (LTE-V2X) operation according to the BWP indicator in the DCI format, and allocating a remaining of the BWPs for a new radio V2X (NR-V2X) operation according to the BWP indicator in the DCI format.